Graphitic Carbon-Coated FeSe2 Hollow Nanosphere-Decorated Reduced Graphene Oxide Hybrid Nanofibers as an Efficient Anode Material for Sodium Ion Batteries

Jung Sang Cho, Jung Kul Lee, Yun Chan Kang

Research output: Contribution to journalArticle

90 Citations (Scopus)

Abstract

A novel one-dimensional nanohybrid comprised of conductive graphitic carbon (GC)-coated hollow FeSe2 nanospheres decorating reduced graphene oxide (rGO) nanofiber (hollow nanosphere FeSe2 @GC-rGO) was designed as an efficient anode material for sodium ion batteries and synthesized by introducing the nanoscale Kirkendall effect into the electrospinning method. The electrospun nanofibers transformed into hollow nanosphere FeSe2 @GC-rGO hybrid nanofibers through a Fe@GC-rGO intermediate. The discharge capacities of the bare FeSe2 nanofibers, nanorod FeSe2-rGO-amorphous carbon (AC) hybrid nanofibers, and hollow nanosphere FeSe2 @GC-rGO hyrbid nanofibers at a current density of 1 A g -1 for the 150th cycle were 63, 302, and 412 mA h g -1, respectively, and their corresponding capacity retentions measured from the 2nd cycle were 11, 73, and 82%, respectively. The hollow nanosphere FeSe2 @GC-rGO hybrid nanofibers delivered a high discharge capacity of 352 mA h g-1 even at an extremely high current density of 10 A g -1. The enhanced electrochemical properties of the hollow nanosphere FeSe2 @GC-rGO composite nanofibers arose from the synergetic effects of the FeSe2 hollow morphology and highly conductive rGO matrix.

Original languageEnglish
Article number23699
JournalScientific Reports
Volume6
DOIs
Publication statusPublished - 2016 Apr 1

ASJC Scopus subject areas

  • General

Fingerprint Dive into the research topics of 'Graphitic Carbon-Coated FeSe<sub>2</sub> Hollow Nanosphere-Decorated Reduced Graphene Oxide Hybrid Nanofibers as an Efficient Anode Material for Sodium Ion Batteries'. Together they form a unique fingerprint.

  • Cite this